Monitoring applications using `-[NSObject addObserver:forKeyPath:options:context:]` or `observe (_:options:changeHandler:)` will crash if monitor it with Instruments Leaks.
Originator: | kishikawakatsumi | ||
Number: | rdar://39478939 | Date Originated: | April 17 2018 |
Status: | Open | Resolved: | |
Product: | Xcode | Product Version: | Xcode 9.3 (9E145)/Xcode 9.4 beta (9Q1004a) |
Classification: | Bug | Reproducible: | Always |
Summary: When an application calls `[NSObject addObserver:forKeyPath:options:context:]` or `observe (_:options:changeHandler:)` and it is monitored by Instruments Leaks, it will crash. Steps to Reproduce: 1. Open the project that I attached. 2. Product>Build>For Profiling 3. Product>Perform Action>Profile Without Building 4. Select "Leaks" in "Instruments" 5. Press "Record" button to begin profiling... 6. The app will crash Expected Results: No crash and can be monitored memory leaks Actual Results: An app will crash Version/Build: Xcode 9.3 (9E145) Xcode 9.4 beta (9Q1004a) Configuration:
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